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Performance enhancement for tube bank staggered configuration heat exchanger – CFD Study
Chemical Engineering and Processing: Process Intensification ( IF 3.8 ) Pub Date : 2021-03-19 , DOI: 10.1016/j.cep.2021.108392
Ahmed M. Nagib Elmekawy , Alaa A. Ibrahim , Abdalrahman M. Shahin , Sara Al-Ali , Gasser E. Hassan

The effect of attaching a splitter plate to the circular tube on the performance of a heat exchanger with a circular tube bank is investigated. A CFD model is developed to simulate the cross-flow behavior inside the heat exchanger. The study of the thermal performance of the tube bank heat exchanger with staggered configuration with and without attached splitter plates to the tubes is conducted. The numerical results are compared with previous experimental and numerical data. Results show that attaching the splitter plates to the tubes can reduce the pressure drop and increase the Nusselt number leading to better overall thermal performance for the heat exchangers and indicate that the splitter plates should be as thin as possible to keep the optimum overall performance. As the splitter thickness is increased to about 20 % of the pipe diameter the heat transfer is slightly increased by about 7 % but the pressure drop is dramatically increased by about 20%. As splitter length is increased up to L/D ratio of 1.5, the heat transfer is doubled, the pressure drop as well is increased by about 20%.



中文翻译:

管束交错配置热交换器的性能增强– CFD研究

研究了将隔板安装在圆管上对带有圆管束的热交换器的性能的影响。开发了一个CFD模型来模拟热交换器内部的错流行为。进行了带有和不带有分隔板的交错布置的管束式换热器的热性能研究。数值结果与先前的实验和数值数据进行了比较。结果表明,将隔板安装在管子上可减少压降并增加Nusselt数,从而使热交换器具有更好的整体热性能,并且表明隔板应尽可能薄,以保持最佳的整体性能。当分流器的厚度增加到管道直径的约20%时,热传递会略微增加约7%,但压降会急剧增加约20%。当分流器长度增加到L / D比为1.5时,传热增加一倍,压降也增加了大约20%。

更新日期:2021-03-27
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